"Optional. This is a path to a UNIX domain socket that will be used forcommunication between the DataNode and local HDFS clients. If the string"_PORT" is present in this path, it will be replaced by the TCP port of theDataNode."

I am trying to evaluate the short-circuit read and find that typically thisdfs.domain.socket.path is used in conjunction to enabling the short circuitfor HDFS.I am using Hadoop 1.1.2. And from the source code of Hadoop 1.1.2, I cannot find the configuration parameter of this "dfs.domain.socket.path" and Iwonder whether this parameter setting only gets used by Hadoop 2.*release?

Could you provide explanation on this about the Hadoop version support?

HDFS-347 introduced this feature, and it is currently only availablein 2.1.x onwards.

On Wed, Sep 11, 2013 at 12:00 AM, Jun Li <[EMAIL PROTECTED]> wrote:> Hi,>> In the link,> http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-hdfs/hdfs-default.xml,>> the explanation:> dfs.domain.socket.path>> is that:>> "Optional. This is a path to a UNIX domain socket that will be used for> communication between the DataNode and local HDFS clients. If the string> "_PORT" is present in this path, it will be replaced by the TCP port of the> DataNode.">> I am trying to evaluate the short-circuit read and find that typically this> dfs.domain.socket.path is used in conjunction to enabling the short circuit> for HDFS.>>> I am using Hadoop 1.1.2. And from the source code of Hadoop 1.1.2, I can not> find the configuration parameter of this "dfs.domain.socket.path" and I> wonder whether this parameter setting only gets used by Hadoop 2.* release?>> Could you provide explanation on this about the Hadoop version support?>> Regards,>> Jun>>

-- Harsh J

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Harsh J 2013-09-10, 21:17

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